Detector assembly for use in ct imaging systems
a technology of ct imaging and assembly, which is applied in the direction of instruments, radiation generation arrangements, tomography, etc., can solve the problem that the use of diodes that are matched to the dimensions of pixels may be relatively expensiv
Active Publication Date: 2017-10-26
MORPHO DETECTION INC
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Benefits of technology
The detector assembly described in this patent is designed for a CT imaging system. It includes a scintillator block with multiple pixels and photodiodes, connected by a light guide consisting of multiple light pipes. Each pixel has a smaller cross-sectional area than the corresponding photodiode, allowing for improved light coupling. The method of assembly involves coupling the light guide to the scintillator block and then connecting the photodiodes to the light guide. The technical effects include improved light coupling, reduced light loss, and improved image quality.
Problems solved by technology
Accordingly, using diodes that are matched to the dimensions of the pixels may be relatively expensive.
Method used
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[0013]The systems and methods described herein provide a detector assembly for a CT imaging system. The detector assembly includes a scintillator block including a plurality of pixels. Each pixel is configured to receive x-ray beams travelling in a transmission direction. The detector assembly further includes a plurality of photodiodes, and a light guide coupled between the scintillator block and the plurality of photodiodes. Each pixel has a first cross-sectional area and each photodiode has a second cross-sectional area. The first cross-sectional area is larger than the second cross-sectional area.
[0014]Referring now to FIGS. 1 and 2, a computed tomography (CT) imaging system 10 is shown. CT imaging system 10 is shown having a gantry 12, which is representative of a CT scanner, a control system 14, and a motorized conveyor belt 16 for positioning an object 18, such as a piece of luggage, in a gantry opening 20 defined through gantry 12. Gantry 12 includes an x-ray source 22 that ...
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Abstract
A detector assembly for a CT imaging system is provided. The detector assembly including a scintillator block including a plurality of pixels, each pixel configured to receive x-ray beams travelling in a transmission direction, a plurality of photodiodes, and a light guide coupled between the scintillator block and the plurality of photodiodes, the light guide including a plurality of light pipes, each light pipe configured to guide light emitted from a pixel of the plurality of pixels into an associated photodiode of the plurality of photodiodes, wherein each pixel has a first cross-sectional area that is substantially perpendicular to the transmission direction, wherein each photodiode has a second cross-sectional area that is substantially perpendicular to the transmission direction, and wherein the first cross-sectional area is different from the second cross-sectional area.
Description
BACKGROUND[0001]The embodiments described herein relate generally to CT imaging systems, and more particularly, to detector assemblies for CT imaging systems.[0002]In some computed tomography (CT) imaging systems, an x-ray source projects a fan-shaped beam which is collimated to lie within an X-Y plane of a Cartesian coordinate system and generally referred to as an “imaging plane”. The x-ray beam passes through an object being imaged. The beam, after being attenuated by the object, impinges upon an array of radiation detectors. The intensity of the attenuated radiation beam received at the detector array is dependent upon the attenuation of the x-ray beam by the object. Each detector element of the array produces a separate electrical signal that is a measurement of the beam intensity at each detector location. The intensity measurements from all the detectors are acquired separately to produce a transmission profile and reconstruct an image of the object.[0003]Detector assemblies ...
Claims
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IPC IPC(8): G01T1/20G01N23/04
CPCG01T1/2018G01N2223/505G01N23/046G01T1/2002A61B6/037A61B6/40A61B6/4078A61B6/4208A61B6/44A61B6/54
Inventor BURES, BRIAN LEEBASU, SAMIT KUMAR
Owner MORPHO DETECTION INC